The most common appearance of early axes was that they appeared black. That was because they had been subjected to the extreme heat of the forge and then rapidly cooled with the resulting surface becoming black in appearance. That black appearance endured providing the axe was not scratched or exposed to certain conditions such as excessive moisture of corrosive chemicals. With a little care the scratches would usually turn blackish again. That was because of the makeup of the metal. Nowadays that overall dark appearance is referred to as a natural patina. Initially it was an oxide that affected the original surface. It was not normally rust as we experience today. The composition of the metal was a determining factor.
As the metal used for axes was modified to make it more useful for an axe it was more prone to rust so larger makers coated the metal to protect it and make each item more uniform in appearance. One of the primary materials used for coating was a type of oil-based varnish with lamp-black added. Of course other coatings were used but the black coating provided a coating that hid minor discoloration as well as protected the surface from normal moisture exposure. That coating eventually became commonly known as paint.
It is surmised that some early manufacturer found that on occasion a coating of red paint did the same while adding two other attributes; it was more eye catching and it made the axe stand out from that of competitors. The red coloring was obtained from vermilion (the natural form is a mineral called cinnabar). Vermilion is more orange (Chinese red) than what is commonly considered red today but it was mixed with something else to make it more of a scarlet red. That raised the question; was the material used ferrous oxide and was it obtained from the grinding of axe heads?
If the rational for using red was as surmised it did not remain unique to one maker for very long and soon many makers were using a red coating. The original time frame for the introduction of paint coating on axes is the last quarter of the 1800s.
The next color that was introduced as an axe color was blue. It was usually used in specific areas on an axe head such as the “bevels” on W. C. Kelly axes. Along with the use of blue, axe makers introduced the use of bronzing paints, which in the late 1800s were made to look like gold. Bronzing paints were made by mixing extremely finely ground bronze, brass, copper and sometimes zinc into a clear varnish. They retained their luster for some time as long as the clear varnish protected the metal particles. Silver paint was obtained from mixing ground aluminum into the varnish but that did not become economically practical until the beginning of the 1900s.
To a much lesser degree other colors were also applied to axes. It is believed that was more as a feature used to distinguish one brand or brands offered by certain wholesalers from those made by others. Another reason was to identify axes belonging to major users who bought in bulk. A specific color was less prone to be pilfered. That of course was not the only reason. Marking schemes were rapidly emerging and color played a major role in many of those schemes.
Another consideration was that paper labels stood out and appeared quite differently on an axe painted a color rather than black. Many advertisements showed the label on a painted axe head but viewing the label without a colorful background diminished the visual impact significantly.
All things considered, the three most commonly used colors in order of popularity were Black, Red and Blue. Yellow, Green and Orange were available from some makers, usually by request. The Mann Edge Tool Company did use yellow on some axe heads as a stock color but that was quite limited. Dark green has been seen occasionally but enough to suggest it was a stock color for some axes by a company that did not include any permanent markings. Orange was used for high visibility (even today); gray by the Navy and Coast Guard and Military Green by the Army and Marines. A brown finish was obtained from a chemical process much like the Sager process that resulted in a blued finish.
The description or naming of colors was not complex in the late 1800s and early 1900s. The name was often prefaced by words like light, medium and dark and/or glossy, bright or dull. Sometimes a color name was a combination of color names such as red-orange. Whatever the name, colors requested that were other than black or red usually resulted in a slightly higher price unless the order was very large.